Comprehensive Type Hints and Type Safety

[sjackson0109]

Overview

The current codebase lacks comprehensive type hints and modern Python typing practices. While some files use basic type hints, many functions and methods are missing proper type annotations.

Issues Identified

• Missing return type annotations for most functions
• Inconsistent use of Optional vs Union types
• Missing type hints for class attributes
• No use of generics or advanced typing features
• Function parameters lacking type specifications

Proposed Improvements

1. Add comprehensive type hints to all functions and methods
2. Use typing.Optional consistently instead of Union[Type, None]
3. Add type hints for class attributes using typing.ClassVar where appropriate
4. Implement proper generic typing for container classes
5. Use typing.Literal for string constants
6. Add typing.Protocol for interface definitions

Benefits

• Better IDE support and autocompletion
• Easier debugging and development
• Improved code documentation
• Better static analysis with mypy
• Enhanced maintainability

Implementation Plan

• Start with core modules: pt_hub.py, pt_data_provider.py, pt_trainer.py
• Add mypy configuration to project
• Create typing utilities module for common types
• Document typing standards in coding guidelines